Is NDAX a Bitcoin wallet?

I'm curious to know if NDAX can be considered a Bitcoin wallet. I understand that NDAX is a cryptocurrency exchange platform, but does it offer the functionality of a Bitcoin wallet where users can store, send, and receive Bitcoin securely? Can you clarify if NDAX provides a wallet service specifically for Bitcoin or if users need to rely on external wallets for their Bitcoin transactions? I'm looking for a clear understanding of NDAX's capabilities in this regard.